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Strattec Security (STRT): OEM concentration is the business — and the risk

Strattec Security designs, develops and manufactures automotive access control hardware (locks, latches, keys & fobs, electronic start systems) and monetizes by selling directly into OEM vehicle platforms under multi‑year program windows. Revenue is driven by being the incumbent supplier on vehicle platforms where certification and customization create high switching costs; profitability and valuation therefore hinge on a small number of large OEM relationships and North American production flows.

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Why customers are the product: concentration and platform economics

Strattec’s product set is hardware‑heavy and platform‑dependent, meaning once a design is selected for a vehicle program the company typically supports that application for the vehicle’s life cycle. That structure delivers predictable follow‑on revenue while also concentrating commercial risk in a handful of OEMs. The FY2025 10‑K shows three OEMs represented a majority of sales, and a December 2025 quarter filing summary confirms the same customers remain dominant at the platform level. These dynamics create a classic tradeoff: stable, high‑margin product streams against outsized client concentration risk.

Customer-by-customer: who moves STRT’s top line

General Motors Company (GM)

General Motors accounted for 29% of Strattec’s net sales in FY2025, making GM the single largest customer and a material revenue driver for the company. According to the company’s FY2025 Form 10‑K, GM represented roughly $165.7 million of net sales (29% of total net sales). A TradingView synopsis of the company’s quarterly disclosure for the three months ended December 28, 2025 reaffirmed GM’s 29% share for that quarter.

Ford Motor Company

Ford represented 23% of net sales in FY2025 and remains a top volume customer at the platform level; the December 28, 2025 quarterly disclosure puts Ford at roughly 18% for that three‑month period, reflecting program timing rather than a structural exit. The FY2025 Form 10‑K lists Ford at $129.2 million of net sales (23% of total), and the TradingView summary of the subsequent quarter shows Ford accounting for 18% of three‑month net sales.

Stellantis

Stellantis accounted for 12% of net sales in FY2025 according to Strattec’s FY2025 Form 10‑K, and quarter reporting for the period ending December 28, 2025 shows Stellantis at about 18% of three‑month net sales — signalling program timing and seasonality in addition to baseline exposure. The FY2025 disclosure records Stellantis sales at $65.8 million (12% of total), and the TradingView quarter note confirms Stellantis’s elevated share in the December quarter.

The contract and lifecycle constraints that define operations

Strattec’s public filings and reporting highlight several company‑level operating constraints that shape investor expectations:

  • Long‑term, platform‑tied contracts: Once designed into a vehicle, products are typically supported for the life of the vehicle—normally five to seven years—which creates revenue visibility and incumbency advantages (company 10‑K, FY2025).
  • North American production concentration: The company ships approximately 65% of sales to U.S. production sites (USMCA‑compliant), with material shipments to Mexico and Canada; sales are attributed to the countries where products are shipped (10‑K, FY2025). This is a fundamental geographic exposure for investors.
  • Global reach managed from Milwaukee: Headquarters in Milwaukee oversees U.S. and Mexican operations for a broader global customer base, so while North America is dominant, Strattec operates with global customers in mind (10‑K language).
  • Material customer concentration: The FY2025 filings quantify that GM (29%), Ford (23%) and Stellantis (12%) together represented 64% of net sales, a direct indicator that top‑line performance is driven by a small number of relationships (10‑K, FY2025).
  • Seller role and hardware focus: Strattec is a direct supplier to OEMs and competes in a hardware‑first product segment (locks, latches, fobs, etc.), which enforces certification barriers and customization costs that protect incumbency (10‑K).

Those constraints are not theoretical — they are the operating model. Investors should treat them as structural characteristics that determine both upside (program wins, stable platform revenue) and downside (loss of a program, OEM volume swings).

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Investment implications: visibility, vulnerability, and valuation

  • Revenue visibility is higher than for typical aftermarket players because of platform lifecycles and incumbent status; long product support horizons (5–7 years) mean revenue streams are sticky when programs continue.
  • Customer concentration is the dominant risk factor. Losing or materially scaling back a major program at GM or Ford would have a disproportionate effect on margins and free cash flow. The FY2025 10‑K quantifies how concentrated that risk is.
  • Geographic concentration to NA production gives both stability and exposure: U.S. OEM production strength supports current revenue, but any regional production shifts or OEM sourcing changes would immediately influence results.
  • Valuation context: At the time of the latest summary data, Strattec shows a modest EV/EBITDA multiple and a Price/Book in the low‑teens range relative to returns on equity, suggesting the market prices both the predictability of platform revenue and the customer concentration risk into the stock.

Risks to monitor (quick checklist)

  • Customer program award updates for GM, Ford and Stellantis — any change in awarded platforms directly updates revenue forecasts.
  • Shipment volumes to U.S., Mexico and Canada production sites—shifts indicate program ramp or decline.
  • New OEM wins or diversifications outside core hardware products that would materially reduce top‑customer exposure.
  • Input‑cost inflation or supply interruptions that compress the company’s narrow operating margin band.

Bottom line and next steps

Strattec’s business is a concentrated, hardware‑centric supplier model with long platform lives and significant North American exposure. For investors, that translates into clearer revenue visibility when program positions hold, and acute downside if one of the three major OEM relationships weakens.

For a deeper look at customer relationships and program‑level intelligence, visit https://nullexposure.com/

Explore the platform and download structured customer signals at https://nullexposure.com/ to integrate this vendor concentration view into your investment diligence.